From c327f3b58090048baf06e9b6f5f1b8e654fda3dd Mon Sep 17 00:00:00 2001 From: rapperskull Date: Thu, 18 May 2023 19:48:17 +0200 Subject: [PATCH] First push --- .gitignore | 3 + .gitmodules | 6 + CMakeLists.txt | 48 +++++ LICENSE | 202 ++++++++++++++++++ README.md | 35 +++ getopt | 1 + libnvbk | 1 + module.prop.in | 6 + src/gnss_patcher.c | 164 ++++++++++++++ .../META-INF/com/google/android/update-binary | 33 +++ .../com/google/android/updater-script | 1 + src/magisk/post-fs-data.sh | 50 +++++ 12 files changed, 550 insertions(+) create mode 100644 .gitignore create mode 100644 .gitmodules create mode 100644 CMakeLists.txt create mode 100644 LICENSE create mode 100644 README.md create mode 160000 getopt create mode 160000 libnvbk create mode 100644 module.prop.in create mode 100644 src/gnss_patcher.c create mode 100644 src/magisk/META-INF/com/google/android/update-binary create mode 100644 src/magisk/META-INF/com/google/android/updater-script create mode 100644 src/magisk/post-fs-data.sh diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..5ed5df5 --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +.vs +build +out diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 0000000..3a087c5 --- /dev/null +++ b/.gitmodules @@ -0,0 +1,6 @@ +[submodule "getopt"] + path = getopt + url = https://github.com/skeeto/getopt.git +[submodule "libnvbk"] + path = libnvbk + url = https://github.com/rapperskull/libnvbk.git diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..4d922d9 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,48 @@ +cmake_minimum_required(VERSION 3.12) +project(RealmeGPSL5Enabler + VERSION "0.0.1" + DESCRIPTION "Enable L5/E5a/B2a GPS bands on realme devices." + LANGUAGES C +) + +add_subdirectory(libnvbk EXCLUDE_FROM_ALL) + +set(sources_dir ${CMAKE_CURRENT_SOURCE_DIR}/src) + +add_executable(gnss_patcher ${sources_dir}/gnss_patcher.c) +if(WIN32) + target_sources(gnss_patcher PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/getopt/getopt.h) + target_include_directories(gnss_patcher PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/getopt) +endif() +set_property(TARGET gnss_patcher PROPERTY C_STANDARD 99) +set_property(TARGET gnss_patcher PROPERTY C_EXTENSIONS ON) +if(MSVC) + target_compile_options(gnss_patcher PUBLIC /W4) +else() + target_compile_options(gnss_patcher PUBLIC -Wall PUBLIC -Wextra PUBLIC -Wpedantic) +endif() +target_link_libraries(gnss_patcher nvbk) + +if(ANDROID) + set(MAGISK_LONG_NAME "realme GPS L5 Enabler") + set(MAGISK_VERSION_CODE 1) + + set(MAGISK_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src/magisk/) + set(MAGISK_FILES + META-INF/com/google/android/update-binary + META-INF/com/google/android/updater-script + post-fs-data.sh + ) + list(TRANSFORM MAGISK_FILES PREPEND ${MAGISK_DIR} OUTPUT_VARIABLE MAGISK_SRC) + + configure_file(${CMAKE_CURRENT_SOURCE_DIR}/module.prop.in ${CMAKE_CURRENT_BINARY_DIR}/module.prop @ONLY) + add_custom_target( + create_release ALL + COMMAND ${CMAKE_COMMAND} -E copy_directory ${MAGISK_DIR} ${CMAKE_CURRENT_BINARY_DIR} + COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE ${CMAKE_CURRENT_BINARY_DIR} + COMMAND ${CMAKE_COMMAND} -E tar cf ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-v${PROJECT_VERSION}.zip --format=zip ${MAGISK_FILES} module.prop gnss_patcher LICENSE + DEPENDS gnss_patcher ${CMAKE_CURRENT_BINARY_DIR}/module.prop + SOURCES ${MAGISK_SRC} + WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} + ) +endif() diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..d645695 --- /dev/null +++ b/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/README.md b/README.md new file mode 100644 index 0000000..852b0e8 --- /dev/null +++ b/README.md @@ -0,0 +1,35 @@ +# realme GPS L5 Enabler Magisk Module + +Magisk module to enable L5/E5a/B2a GPS bands on realme/OPPO/OnePlus devices with Qualcomm Snapdragon processors. It has been tested only on realme GT 2 Pro (RMX3301), but it should work on other devices too if there's hardware support. + +## How it works + +At each boot, it extracts the `oplusstanvbk` partition, patches it, and changes the `/nv/item_files/gps/cgps/me/gnss_multiband_configuration` property, saving it in the module's directory. + +Then, a loop device pointing to the patched file is created and the symlinks under `/dev/block/by-name` and `/dev/block/bootdevice/by-name` are changed to point to the patched block device instead of the original one. + +The change is applied only to the current slot, so that you can install OTA updates without problems. + +The source code of the patcher is available under [src/gnss_patcher.c](src/gnss_patcher.c) and is based on [libnvbk](https://github.com/rapperskull/libnvbk). + +If you want, you can compile it under Windows or Linux, patch the partition offline and flash it with fastboot. + +## Compiling + +Every dependency is included as a git submodule, so make sure to run `git submodule update --init --recursive` after cloning. + +To compile you need a working CMake environment. + +When cross-compiling for Android, the Magisk zip file is created automatically, but make sure `BUILD_SHARED_LIBS` is `OFF`. + +## License + +Unless otherwise specified, all the files in this repository are licensed under the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). + +The full text of the license can be found in [LICENSE](LICENSE). + +## Dependencies + +This project depends on [libnvbk](https://github.com/rapperskull/libnvbk), also written by me, and distributed under Apache License 2.0. The library itself has other dependencies. + +Under Windows, a [getopt](https://github.com/skeeto/getopt) implementation is used, distributed under The Unlicense, and effectively Public Domain. diff --git a/getopt b/getopt new file mode 160000 index 0000000..4e618ef --- /dev/null +++ b/getopt @@ -0,0 +1 @@ +Subproject commit 4e618ef782dc80b2cf0307ea74b68e6a62b025de diff --git a/libnvbk b/libnvbk new file mode 160000 index 0000000..9801184 --- /dev/null +++ b/libnvbk @@ -0,0 +1 @@ +Subproject commit 9801184c01f5b6728522cef22efed24c115cb71b diff --git a/module.prop.in b/module.prop.in new file mode 100644 index 0000000..c3a7207 --- /dev/null +++ b/module.prop.in @@ -0,0 +1,6 @@ +id=@PROJECT_NAME@ +name=@MAGISK_LONG_NAME@ +version=@PROJECT_VERSION@ +versionCode=@MAGISK_VERSION_CODE@ +author=Rapper_skull +description=@PROJECT_DESCRIPTION@ diff --git a/src/gnss_patcher.c b/src/gnss_patcher.c new file mode 100644 index 0000000..c2fa8ae --- /dev/null +++ b/src/gnss_patcher.c @@ -0,0 +1,164 @@ +/* + * Copyright 2023 Rapper_skull + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#if defined(_MSC_VER) + #define _CRT_NONSTDC_NO_WARNINGS // POSIX function names + #define _CRT_SECURE_NO_WARNINGS // Unsafe CRT Library functions +#endif + +#include +#include // Provided by CMake on Windows +#include +#include +#include +#include +#include +#include +#include + +#define GNSS_RF_ID 0xFF +#define GNSS_ENTRY_LEN 0x4D +#define GNSS_ENTRY_DATA_LEN 5 + +unsigned char gnss_entry[GNSS_ENTRY_LEN - sizeof(uint32_t) - GNSS_ENTRY_DATA_LEN] = { + 0x02, 0x19, 0xFF, 0x18, 0x01, 0x00, 0x38, 0x00, 0x2F, 0x6E, 0x76, 0x2F, 0x69, 0x74, 0x65, 0x6D, + 0x5F, 0x66, 0x69, 0x6C, 0x65, 0x73, 0x2F, 0x67, 0x70, 0x73, 0x2F, 0x63, 0x67, 0x70, 0x73, 0x2F, + 0x6D, 0x65, 0x2F, 0x67, 0x6E, 0x73, 0x73, 0x5F, 0x6D, 0x75, 0x6C, 0x74, 0x69, 0x62, 0x61, 0x6E, + 0x64, 0x5F, 0x63, 0x6F, 0x6E, 0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6F, 0x6E, 0x00, + 0x02, 0x00, 0x05, 0x00 +}; + +char gnss_old_data[GNSS_ENTRY_DATA_LEN] = {0x07, 0x00, 0x00, 0x00, 0x00}; +char gnss_new_data[GNSS_ENTRY_DATA_LEN] = {0x07, 0x27, 0x00, 0x00, 0x00}; + +#define GETOPT_STRING "hi:o:f" + +void usage(char* name) { + printf("%s: %s [-h|-i INFILE -o OUTFILE [-f]]\n", name, name); + printf("Patch OPPO/realme/OnePlus NVBK to enable GNSS L5/E5a/B2a bands.\n"); +} + +void error(int err) { + printf("Error: %s\n", strerror(err)); + exit(2); +} + +int main(int argc, char** argv) { + int opt, res; + char* infile = NULL; + char* outfile = NULL; + bool force = false, done = false; + nvbk_header_t* header; + unsigned char* ptr; + uint32_t len; + + if (argc < 2) { + usage(argv[0]); + exit(1); + } + + while ((opt = getopt(argc, argv, GETOPT_STRING)) != -1) { + switch (opt) { + case 'i': + if ((infile = strdup(optarg)) == NULL) error(errno); + break; + case 'o': + if ((outfile = strdup(optarg)) == NULL) error(errno); + break; + case 'f': + force = true; + break; + default: + usage(argv[0]); + exit(opt != 'h' ? 1 : 0); + } + } + + if (!infile || !outfile) { + usage(argv[0]); + exit(1); + } + + header = nvbk_open(infile, &res); + if (header == NULL || res != 0) { + printf("Error: %s\n", nvbk_strerror(res)); + } + else { + if (header->type == NVBK_TYPE_STATIC) { + int i; + for (i = 0; i < header->num_entries; i++) { + if (header->entries[i].rf_id == GNSS_RF_ID) break; + } + if (i < header->num_entries) { + printf("Found RF_ID 0x%02X: entry %d, size 0x%lX, offset 0x%lX.\n", GNSS_RF_ID, i, header->entries[i].size, header->entries[i].pos); + + res = nvbk_read_entry(header, i); + if (res != NVBK_ERR_OK) { + printf("Error: %s\n", nvbk_strerror(res)); + } + else { + ptr = header->entries[i].entry_data; + while (ptr < header->entries[i].entry_data + header->entries[i].size) { + len = le32toh(*(uint32_t*)ptr); + if (len == 0) break; + if (ptr + len <= header->entries[i].entry_data + header->entries[i].size && len == GNSS_ENTRY_LEN) { + if (!memcmp(ptr + sizeof(uint32_t), gnss_entry, GNSS_ENTRY_LEN - sizeof(uint32_t) - GNSS_ENTRY_DATA_LEN)) { + printf("Found gnss_multiband_configuration at pos 0x%tX.\n", ptr - header->entries[i].entry_data + header->entries[i].pos); + + unsigned char* data_start = ptr + GNSS_ENTRY_LEN - GNSS_ENTRY_DATA_LEN; + if (!memcmp(data_start, gnss_old_data, GNSS_ENTRY_DATA_LEN)) { + printf("gnss_multiband_configuration data match!\n"); + + memcpy(data_start, gnss_new_data, GNSS_ENTRY_DATA_LEN); + res = nvbk_update_hash(header, i); + if (res != NVBK_ERR_OK) { + printf("Error: %s\n", nvbk_strerror(res)); + } + else { + res = nvbk_write_to_file(header, outfile, force); + if (res != NVBK_ERR_OK) { + printf("Error: %s\n", nvbk_strerror(res)); + } + else { + done = true; + printf("Success!!!\n"); + } + } + } + else { + printf("gnss_multiband_configuration data does not match:"); + for (int j = 0; j < GNSS_ENTRY_DATA_LEN; j++) { + printf(" 0x%02X", *(data_start + j)); + } + printf("\n"); + } + break; + } + } + ptr += len; + } + } + } + } + } + + nvbk_free_header(header); + if (infile) free(infile); + if (outfile) free(outfile); + + if (!done) return 3; + return 0; +} diff --git a/src/magisk/META-INF/com/google/android/update-binary b/src/magisk/META-INF/com/google/android/update-binary new file mode 100644 index 0000000..28b48e5 --- /dev/null +++ b/src/magisk/META-INF/com/google/android/update-binary @@ -0,0 +1,33 @@ +#!/sbin/sh + +################# +# Initialization +################# + +umask 022 + +# echo before loading util_functions +ui_print() { echo "$1"; } + +require_new_magisk() { + ui_print "*******************************" + ui_print " Please install Magisk v20.4+! " + ui_print "*******************************" + exit 1 +} + +######################### +# Load util_functions.sh +######################### + +OUTFD=$2 +ZIPFILE=$3 + +mount /data 2>/dev/null + +[ -f /data/adb/magisk/util_functions.sh ] || require_new_magisk +. /data/adb/magisk/util_functions.sh +[ $MAGISK_VER_CODE -lt 20400 ] && require_new_magisk + +install_module +exit 0 diff --git a/src/magisk/META-INF/com/google/android/updater-script b/src/magisk/META-INF/com/google/android/updater-script new file mode 100644 index 0000000..492be83 --- /dev/null +++ b/src/magisk/META-INF/com/google/android/updater-script @@ -0,0 +1 @@ +#MAGISK \ No newline at end of file diff --git a/src/magisk/post-fs-data.sh b/src/magisk/post-fs-data.sh new file mode 100644 index 0000000..c912803 --- /dev/null +++ b/src/magisk/post-fs-data.sh @@ -0,0 +1,50 @@ +#!/system/bin/sh + +MODDIR="${0%/*}" +LOGFILE="${MODDIR}/post-fs-data.log" +PATCHER="${MODDIR}/gnss_patcher" +MODFILE="${MODDIR}/patched_oplusstanvbk" + +SLOT="$(resetprop ro.boot.slot_suffix)" +PATH1="/dev/block/by-name/oplusstanvbk${SLOT}" +PATH2="/dev/block/bootdevice/by-name/oplusstanvbk${SLOT}" + +exec > "$LOGFILE" +exec 2>&1 + +echo "Slot: ${SLOT}" +echo +ls -la "$PATH1" "$PATH2" +echo +if [ -L "$PATH1" ] || [ -L "$PATH2" ]; then + rm -f "$MODFILE" + if [ -L "$PATH1" ]; then + orig="$(readlink -fn ${PATH1})" + else + orig="$(readlink -fn ${PATH2})" + fi + chmod +x "$PATCHER" + echo "Running patcher" + "$PATCHER" -i "$orig" -o "$MODFILE" + ret=$? + if [ $ret -ne 0 ]; then + echo "Patcher failed!!!" + else + echo + DEV="$(/system/bin/losetup -sf $MODFILE)" + if [ -z "$DEV" ]; then + echo "ERROR: Cannot create loop device" + else + echo "Created loop device" "$DEV" + chcon -v "u:object_r:vendor_custom_ab_block_device:s0" "${DEV}" + if [ -L "$PATH1" ]; then + ln -sfv "${DEV}" "$PATH1" + fi + if [ -L "$PATH2" ]; then + ln -sfv "${DEV}" "$PATH2" + fi + echo + ls -la "$PATH1" "$PATH2" + fi + fi +fi